Shift (The Shade Trilogy) Reprint edition

In the second book of the Shade trilogy from Jeri Smith-Ready, Aura is torn between the two boys who hold her heart?and determined to unravel the secrets of the Shift.

Aura?s life is anything but easy. Her boyfriend, Logan, died, and his slides between ghost and shade have left her reeling. Aura knows he needs her now more than ever. She loves Logan, but she can?t deny her connection with the totally supportive, totally gorgeous Zachary. And she?s not sure that she wants to.
     Logan and Zachary will fight to be the one at her side, but Aura needs them both to uncover the mystery of her past?the mystery of the Shift. She?s not the only one seeking answers, though, and danger grows as she discovers new truths.
     Who can Aura trust with her secrets? And to whom will she give her heart?